Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Accumulated Other Comprehensive Loss, Net	Retained Earnings	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2018	$ 376,772	$ 461	$ 327,009	$ (66,877)	$ 116,276	$ (97)
Balance at beginning of period (in shares) at Dec. 31, 2018		46,134,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares for share-based compensation, net of forfeitures	2	$ 2
Issuance of common shares for share-based compensation, net of forfeitures (in shares)		174,000
Share-based compensation expense	4,484		4,484
Tax payments related to share-based compensation	(1,781)		(1,781)
Unrealized loss on interest rate swap and foreign currency forward contracts, net of deferred income tax benefit	(13,069)			(13,069)
Net income attributable to controlling interests	4,319				4,319
Net loss attributable to noncontrolling interests	(2)					(2)
Foreign currency translation adjustments, net of deferred income tax benefit	5,104			5,102		2
Balance at end of period at Mar. 31, 2019	375,829	$ 463	329,712	(74,478)	120,229	(97)
Balance at end of period (in shares) at Mar. 31, 2019		46,308,000
Balance at beginning of period at Dec. 31, 2018	376,772	$ 461	327,009	(66,877)	116,276	(97)
Balance at beginning of period (in shares) at Dec. 31, 2018		46,134,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to controlling interests	48,274
Balance at end of period at Dec. 31, 2019	$ 380,326	$ 447	332,109	(77,887)	125,763	(106)
Balance at end of period (in shares) at Dec. 31, 2019	44,676,132	44,676,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares for share-based compensation, net of forfeitures	$ 274	$ 3	271
Issuance of common shares for share-based compensation, net of forfeitures (in shares)		286,000
Share-based compensation expense	5,193		5,193
Tax payments related to share-based compensation	(5,515)		(5,515)
Repurchase of common shares (in shares)		(506,000)
Repurchase of common shares	(16,873)	$ (5)	(3,530)		(13,338)
Unrealized loss on interest rate swap and foreign currency forward contracts, net of deferred income tax benefit	(39,842)			(39,842)
Net income attributable to controlling interests	5,755				5,755
Net loss attributable to noncontrolling interests	(6)					(6)
Foreign currency translation adjustments, net of deferred income tax benefit	(19,582)			(19,620)	(3)	41
Balance at end of period at Mar. 31, 2020	$ 307,859	$ 445	$ 328,528	$ (137,349)	$ 116,306	$ (71)
Balance at end of period (in shares) at Mar. 31, 2020	44,456,153	44,456,000